The building, as named, serves as a de facto embassy in Canada for the Aga Khan, the Imam (spiritual leader) of Nizari Muslims, through which the Aga Khan's office (under the auspices of the Aga Khan Foundation) can receive dignitaries of the Canadian government.

The Delegation of the Ismaili Imamat was formally opened by Prime Minister Stephen Harper on Saturday, December 6, 2008 during an official visit of the Aga Khan to Ottawa.[5] In addition to the Prime Minister, the opening was also attended by several federal ministers including Transport Minister John Baird, Foreign Minister Lawrence Cannon and Minister of State for Status of Women Helena Guergis. Also in attendance were former Governor General Adrienne Clarkson, writer John Ralston Saul, David Mulroney, chief of the PCO Afghan task force, his CIDA counterpart Stephen Wallace, former deputy minister of foreign affairs Peter Harder, the Governor of the Bank of Canada, Chief Justice of Canada Beverley McLachlin, former ambassador to Washington Derek Burney, former Liberal foreign minister Bill Graham, former ambassador to the UN Allan Rock, Herb Gray, the longest serving MP in Canadian history and various ambassadors of other countries to Canada.[6][7]

Demands to see the building are so great the agency provides public tours twice a week. Some 30,000 people have walked through. Since 2009, the building has hosted about 100 events, such as lectures and workshops.

The building includes a library and offices, as well as a residence and office for the Aga Khan’s use during visits.

Designed by Moriyama & Teshima Architects in collaboration with the Pritzker Prize–winning architect Fumihiko Maki,[8] the Ottawa Delegation is the first building in the world that will represent the Ismaili Imamat and its institutions.[3] It is configured as an elongated, rectangular ring, surrounding an interior atrium and an exterior courtyard that features a traditional Chahr-bagh Islamic garden.[1][2] The building rests on a solid linear granite podium, and is covered by a glass dome through which light illuminates the atrium and courtyard.[1] The building as a whole is inspired by natural rock-crystal and is an interplay of visual clarity, opacity and translucency. It houses meeting rooms, exhibition areas, a lecture theatre, resource center, and private apartments.[3]

Side view of the Delegation.

The Aga Khan proposed that Maki take inspiration from rock crystal, which is at once translucent, transparent and opaque. The two-storey structure rests on a podium of black granite. It is clad in white Neoparies, a crystallized glass material with a marble-like texture that reflects light. Side walls are arranged in alternating bands of transparent and translucent glass. The simple rectilinear building contains an atrium topped by an asymmetrical glass dome. Surrounding the atrium is a patterned screen of cast aluminum, evoking screens of historic Islamic architecture.